Means for operating elevator-doors



(No Model.) 2 Sheets-Sheet 1.

E. M. BENSON.

MEANS FOR PERATING ELEVATOR DOORS.

(No Model.) 2 Sheets-Sheet 2. E. M. BENSON. MEANS FOR OPERATING ELEVATOR DOORS.

No. 496,039. PatentedA'pr. 25, 1893.

' UNITED STATES PATENT OFFICE.

ELIAS M. BENSON, OF BALTIMORE, MARYLAND.

MEANS FOR OPERATING ELEVATOR-DOORS.

SPECIFICATION forming part of Letters Patent No. 496,039, dated April 25, 1893.

Application tiled November 2l, 1892. Serial No. 452,740.. (No model.)

To @ZZ whom it may concern,.-

Be it known that I, ELIAs M. BENSON, a citizen of the United States, and a resident of Baltimore city, in the State of Maryland, have invented certain new and useful Improvements in Self Opening and Closing Elevator- Doors, of which the following is a specification.

My invention relates to an automatically removable elevator shutter which is intended to be normally closed but which will be opened by the rise or descent of a car, permitting the c ar to pass, and closing again automatically.

In the drawings Figure 1 is an. elevation of one side of the elevator structure, the car being down and ascending. Fig. 2 is an elevation of the opposite side of the structure, the car being up and descending. Fig. 3 is a plan view of the elevator shutter, the elevator guide being in horizontal section viewing the same from the top. Fig. 1 is a horizontal plan of the elevator shutter and elevator supports in 'section viewing the same from the bottom.

In the drawings similar figures of reference indicate similar parts.

1, 1 are the car guides.

2 is the car.

3 is the suspensory cord.

4 is the elevator shutter.

5 is the bracket or support upon which the shutter'is mounted, which bracket is hinged to one ofthe elevator guides 1 at 6, G.

Referring to Fig. 1, 7 is a right-angle bar of iron pivoted to the elevator guide at 8 at its lower end, the upper end being turned inward toward the guide and having an eye upon its extremity. 9 is asimilar right-angle bar pivoted at 10 on the same guide 1, the lower end being turned toward the elevator guide and also having an eye upon its extremity which registers with the eye in the end of the bar 7. 11 is a spring rigidly secured to the upper end of the bar 9 which is pivoted at 10. The spring 11 is held in a strained position by a stud in the side of the elevator guide 1 so as to exert a pull upon the bars 9 and 7 so as to hold them in the posi tion shown in Fig. 1. 12 is a push rod sliding in bearings 13, 13, which are mounted on the under side of a projecting bracket 14 secured to the side of the elevator guide 1. The extremity of the push rod 12 is provided with a turned-down end 15 which enters the eyes in the extremities of the rods 7 and 9 and secures them to one another, by which the rod 12 is given a sliding motion in its bearings by either of these rods 7 or 9. 16 is a hub pivoted upon a stud 17 in the extremity ofthe bracket 111, to which are secured two levers, one a link 18 shown in Figs. 3 and 4, and 19 a curved lever the end of which is bent into ahook and secured to the hub. The link and the lever are parallel to one another. 2O is a friction roller journaled on the end of the push rod 12 and playing within the curved link 18. 2l is a connecting rod, one end of which is loosely secured to the end of the lever 19, while the other end is secured to the lever 22, which is rigidly secured to and projects from the bracket 5. 23 is a curved slot in the shutterll. through which the rope 3 passes as the shutter swings back and forth.

The operation of the device is as follows: As the car rises it strikes upon the rod 7 and pushes it aside; in doing so, it pushes the push rod 12 and linkA lever 18, and this turns the hub 16 and lever 19, draws the rod 21 and lever 22, and swings the shutter 4 out of the path of the elevator. As soon as the car has gone up, the spring 11 presses the rod 9 out again, draws the bar 12 and levers 18, 19, 21 and 22, and swings the shutter into place again.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. ln an elevator, the combination of a shut` ter mounted upon a pivoted bracket so as to swing out of the path of the elevator car, a pair of rods one pivoted to the elevator frame below the shutter and one above it and rods and levers connecting said pair of rods to the shutter, whereby the shutter will be swung out of the path of the elevator car when the elevator is ascending or descending.

2. In an elevator, the combination of the rod 7, rod 12, lever 18, rod 19, rod 21, lever 22 and pivoted shutter 4, all arranged substantally as described.

3. In an elevator, the combination of a pivoted rod standing in the path of the elevator lo car, rofl 12 connected thereto, lever 18, rod

ELAS M. BENSON.

Witnesses:

JN0. T. MADDOX, l-I. MACCARTHY. 

